Adjustable threshold and sill assembly

Abstract

An adjustable threshold and sill assembly to be used at doorway entrances is disclosed. The assembly comprises a sill (preferably formed from an aluminium alloy material), a water resistant, thermally insulating front of the threshold base member which is preferably resilient but sturdy (high impact polyvinyl chloride material being preferred), means for engaging the threshold base member with the back of the sill, and an adjustable threshold member received by a rectangular channel of the base member and adjustably connected therein for upward and downward movement to vary the level of its upper surface above the open top of the channel.

I claim: 
     
       1. A threshold and sill assembly, comprising: (a) a sill having an elongated front, an elongated back, and a top sloping upwardly from the front to the back;   (b) a water resistant, thermally insulating threshold base member generally disposed rearward of said sill and extending longitudinally in parallel relationship therewith, said base member including a longitudinally extending rectangular channel having an open top;   (c) means for engaging the front of the threshold base member with the back of the sill; and,   (d) an adjustable threshold member received by said channel and adjustably connected therein for upward and downward movement to vary the level of its upper surface above the open top of the channel.   
     
     
       2. A threshold and sill assembly as defined in claim 1, wherein said means for engaging the threshold base member with the back of the sill comprises upper and lower longitudinally extending flanges forming part of said base member for engaging cooperating upper and lower longitudinally extending flanges forming part of the back of said sill. 
     
     
       3. A threshold and sill assembly as defined in claim 2, wherein the sill is formed from aluminium alloy material. 
     
     
       4. A threshold and sill assembly as defined in claim 1, 2 or 3, wherein the base member is formed from a resilient but sturdy material. 
     
     
       5. A threshold and sill assembly as defined in claim 1, 2 or 3, wherein the threshold base member is formed from polyvinyl chloride plastic material. 
     
     
       6. A threshold and sill assembly, comprising: (a) a metallic sill having an elongated front, an elongated back, and a top sloping upwardly from the front to the back, the back including: (i) a vertically disposed back supporting wall;   (ii) a back supporting base extending outwardly from the bottom of said wall;   (iii) an overhang merging along one side with the top of the sill and extending outwardly from the top of said wall over said base;   (iv) a lower flange extending upwardly from said base in parallel relationship with said wall so as to form an upwardly facing elongated channel between said lower flange and said wall; and,   (v) an upper flange extending downwardly from said overhang in parallel relationship with said wall so as to form a downwardly facing elongated channel between said upper flange and said wall;     (b) a water resistant, thermally insulating threshold base member generally disposed rearward of said sill and extending longitudinally in parallel relationship therewith, said base member including: (i) a vertically disposed elongated back supporting wall;   (ii) a horizontally disposed median wall merging with said back supporting wall to divide the back supporting wall into an upper portion above the median wall and a lower portion below the median wall, said median wall extending forwardly to merge with a supporting flange which extends downwardly to engage said sill in the upwardly facing elongated channel of the sill;   (iii) a vertically disposed inner wall extending upwardly from said median wall and in parallel opposed relationship with the upper portion of said back supporting wall so as to form a longitudinally extending rectangular channel having an open top; and,   (iv) a flange extending forwardly from said inner wall, then upwardly to engage said sill in the downwardly facing elongated channel of the sill; and,     (c) an adjustable threshold member received by the rectangular channel of said threshold base member and adjustably connected therein for upward and downward movement to vary the level of its upper surface above the open top of such channel.   
     
     
       7. A threshold and sill assembly as defined in claim 6 including a lip forming part of said base member and extending forwardly from said inner wall to overly the overhang of said sill. 
     
     
       8. A threshold and sill assembly as defined in claim 7, wherein the sill is formed from aluminium alloy material. 
     
     
       9. A threshold and sill assembly as defined in claim 6, 7 or 8, wherein the base member is formed from a resilient but sturdy material. 
     
     
       10. A threshold and sill assembly as defined in claim 6, 7 or 8, wherein the threshold base member is formed from polyvinyl chloride plastic material.